WO2008069118A1 - 石炭灰の処理方法及び処理装置 - Google Patents
石炭灰の処理方法及び処理装置 Download PDFInfo
- Publication number
- WO2008069118A1 WO2008069118A1 PCT/JP2007/073146 JP2007073146W WO2008069118A1 WO 2008069118 A1 WO2008069118 A1 WO 2008069118A1 JP 2007073146 W JP2007073146 W JP 2007073146W WO 2008069118 A1 WO2008069118 A1 WO 2008069118A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mercury
- cement
- coal ash
- unburned carbon
- separated
- Prior art date
Links
- 239000010883 coal ash Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims description 27
- 239000004568 cement Substances 0.000 claims abstract description 78
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 61
- 239000002956 ash Substances 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 11
- 238000005188 flotation Methods 0.000 claims description 6
- 238000003795 desorption Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000010828 elution Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003456 ion exchange resin Substances 0.000 claims description 2
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 description 27
- 238000011084 recovery Methods 0.000 description 7
- 241000628997 Flos Species 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000005526 cement kiln firing Methods 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229940008718 metallic mercury Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/364—Avoiding environmental pollution during cement-manufacturing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
- C04B7/4423—Waste or refuse used as fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
Definitions
- the present invention relates to a method and apparatus for treating coal ash, and in particular, effectively uses fly ash generated in a coal-fired thermal power plant, etc. as a raw material for cement while reducing the mercury concentration in cement kiln exhaust gas.
- the present invention relates to a method and apparatus for treating coal ash.
- fly ash generated in coal-fired thermal power plants and the like has been used as a raw material for cement admixtures, concrete admixtures, artificial lightweight aggregates, and the like.
- various problems occur. Therefore, it is necessary to remove the unburned carbon, and many techniques have been proposed.
- fly ash when fly ash is used as a cement admixture, it is possible to add wet ash to the cement mill after decarburization using the wet flotation method. It is thought that.
- fly ash when fly ash is used as a cement mixture, water is added to the fly ash to form a slurry, and then a foaming agent is added to generate bubbles while stirring. After unburned carbon of ash was adhered, air bubbles were removed, and unburned carbon in fly ash was removed, it was pulverized with a cement mill together with a cleansing force (see, for example, Patent Document 1).
- the exhaust gas of cement kiln contains a trace amount of metallic mercury. Its origin is mercury contained in recyclable resources such as fly ash as well as mercury contained in natural raw materials such as limestone, which is the main raw material of cement.
- Patent Document 1 Japanese Patent No. 3613347
- the present invention has been made in view of the above problems, and is a coal ash capable of effectively using coal ash while reducing the mercury concentration in the exhaust gas of the cement kiln.
- An object is to provide a processing method and a processing apparatus.
- the present invention provides a method for treating coal ash, wherein the coal ash is received in a cement production facility, and the received coal ash is separated into ash and unburned carbon, and separated.
- the ash content is used as a cement raw material in the cement production facility, and the separated unburned carbon is used in the cement production facility according to the mercury concentration in the exhaust gas of the cement kiln of the cement production facility.
- the unburned carbon in which mercury is unevenly distributed is not put into the cement production facility. Because it can be processed in equipment other than the cement production facility and the amount of unburned carbon input to the cement production facility can be adjusted, the increase in the mercury concentration in the exhaust gas from the cement kiln is avoided. be able to.
- unburned carbon obtained by separating mercury from the separated unburned carbon can be used as fuel in the cement manufacturing facility.
- unburned carbon can be used as fuel in the cement manufacturing facility without increasing the mercury concentration in the exhaust gas of the cement kiln.
- the ash and unburned carbon in the coal ash can be separated by an electrostatic method or a flotation method.
- the mercury can be separated from the separated unburned carbon by temperature programmed desorption using an inert gas or elution separation using an oxidizing agent. Further, in the method for treating coal ash, the unburned carbon from which the mercury has been removed is used as a cement kiln firing fuel or a coal ash drying fuel after wet decarbonization. Can be used.
- the mercury removed from the unburned carbon can be adsorbed on an ion exchange resin, or oxidized and separated as a solid to be reduced to a mountain.
- the present invention is a coal ash treatment apparatus, wherein the coal ash is received into a cement production facility, and the first separating means for separating the received coal ash into ash and unburned carbon.
- the ash separated by the first separation means can be used as a cement raw material in the cement production facility, and the first By removing mercury from the unburned carbon separated by the second separation means, the mercury was removed at the cement production facility without increasing the mercury concentration in the exhaust gas of the cement kiln. Use unburned carbon as fuel.
- coal ash can be effectively used while reducing the mercury concentration in the cement kiln exhaust gas.
- a coal ash treatment apparatus 1 includes a fly ash receiving facility 2, an unburned carbon removal device 3, and a mercury recovery device 4.
- the fly ash receiving facility 2 is for receiving fly ash generated in a coal-fired thermal power plant or the like for effective use in the cement manufacturing facility, and includes a pressure-feed tank or the like.
- the unburned carbon removal device 3 removes unburned carbon from the fly ash provided from the fly ash receiving facility 2 by an electrostatic method or a flotation method, and removes ash and unburned carbon. Provided to get.
- the mercury recovery device 4 is provided for separating and recovering mercury from unburned carbon separated from fly ash by the unburned carbon removal device 3, and includes, for example, a temperature-programmed desorption device, an elution separation device, and the like. Used.
- Fly ash is received by a fly ash receiving facility 2 from a coal-fired thermal power plant or the like, and the unburned carbon removal device 3 is supplied via a transporter or the like.
- unburned carbon in the fly ash is removed by the unburned carbon removing device 3.
- Japanese Patent No. 3613347 can use a method for removing unburned carbon from fly ash.
- the ash separated by the unburned carbon removal device 3 is supplied to the cement firing facility 5 as a raw material for cement via a transporter or the like.
- the unburned carbon separated by the unburned carbon removing device 3 is supplied to the mercury recovery device 4 and mercury is recovered from the unburned carbon by temperature-programmed desorption using an inert gas.
- the unburned carbon from which mercury has been removed by the mercury recovery device 4 is used as an auxiliary fuel for cement production in the cement firing device 5.
- This unburned carbon can also be blown from the main burner into a cement kiln that can be blown into the calciner through a burner.
- this unburned carbon it is also possible to use this unburned carbon as a fuel for drying coal ash after wet decommissioning, which can be used simply as a fuel for cement production.
- Mercury separated by the mercury recovery device 4 may be recovered by adsorbing it to an ion exchange membrane resin such as a chelate resin which may be converted into a solid by adding an oxidant to the base.
- an ion exchange membrane resin such as a chelate resin which may be converted into a solid by adding an oxidant to the base.
- Table 1 shows that unburned carbon in fly ash is attached to bubbles by flotation.
- the fly ash slurry is divided into floss containing unburned carbon and tail containing ash, and the results of measuring the mercury content of each are shown.
- Hg was analyzed by heat vaporization atomic absorption spectrometry after finely pulverized after air drying.
- unburned carbon is recovered from a cake obtained by solid-liquid separation of froth, and this unburned carbon is treated in equipment other than the cement manufacturing equipment without being introduced into the cement manufacturing equipment.
- cement raw materials used in cement production facilities are divided into natural raw materials mainly made of limestone, fly ash generated in coal-fired thermal power plants, and other raw materials.
- the amount of raw materials used, the mercury content, the amount of mercury brought in, and the contribution rate are compared.
- FIG. 1 is a flow chart showing an embodiment of a coal ash treatment apparatus according to the present invention.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Public Health (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Gasification And Melting Of Waste (AREA)
- Electrostatic Separation (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020097012194A KR20090106470A (ko) | 2006-12-05 | 2007-11-30 | 석탄회의 처리방법 및 처리장치 |
AT07832843T ATE540905T1 (de) | 2006-12-05 | 2007-11-30 | Verfahren zur verarbeitung von kohlenasche und verarbeitungssystem |
US12/517,071 US8439202B2 (en) | 2006-12-05 | 2007-11-30 | Coal ash treatment method and apparatus |
EP07832843A EP2103575B1 (en) | 2006-12-05 | 2007-11-30 | Method of processing coal ash and processing system |
JP2008548255A JP5657207B2 (ja) | 2006-12-05 | 2007-11-30 | 石炭灰の処理方法及び処理装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006327870 | 2006-12-05 | ||
JP2006-327870 | 2006-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008069118A1 true WO2008069118A1 (ja) | 2008-06-12 |
Family
ID=39492015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/073146 WO2008069118A1 (ja) | 2006-12-05 | 2007-11-30 | 石炭灰の処理方法及び処理装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US8439202B2 (ja) |
EP (1) | EP2103575B1 (ja) |
JP (1) | JP5657207B2 (ja) |
KR (1) | KR20090106470A (ja) |
CN (2) | CN104496224A (ja) |
AT (1) | ATE540905T1 (ja) |
TW (1) | TWI523704B (ja) |
WO (1) | WO2008069118A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2507187T3 (pl) * | 2009-12-03 | 2015-01-30 | Provectus Eng Materiels Ltd | Sposób polepszania spalania popiołów |
KR101432750B1 (ko) * | 2011-08-09 | 2014-08-21 | 서승석 | 석탄재를 이용한 모르타르 또는 콘크리트 조성물 및 그의 용도 |
CN105498981B (zh) * | 2016-02-23 | 2017-08-25 | 中国矿业大学 | 一种具有稳泡特征的高炭粉煤灰浮选脱炭工艺 |
US11179672B2 (en) * | 2017-01-11 | 2021-11-23 | Taiheiyo Engineering Corporation | Method and apparatus for reducing mercury content of cement kiln exhaust gas |
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- 2007-11-30 CN CNA2007800495286A patent/CN101583578A/zh active Pending
- 2007-11-30 TW TW096145633A patent/TWI523704B/zh not_active IP Right Cessation
- 2007-11-30 EP EP07832843A patent/EP2103575B1/en not_active Not-in-force
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- 2007-11-30 JP JP2008548255A patent/JP5657207B2/ja not_active Expired - Fee Related
- 2007-11-30 KR KR1020097012194A patent/KR20090106470A/ko not_active Application Discontinuation
- 2007-11-30 WO PCT/JP2007/073146 patent/WO2008069118A1/ja active Application Filing
- 2007-11-30 AT AT07832843T patent/ATE540905T1/de active
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Also Published As
Publication number | Publication date |
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JP5657207B2 (ja) | 2015-01-21 |
EP2103575A4 (en) | 2010-10-20 |
US20100095872A1 (en) | 2010-04-22 |
CN101583578A (zh) | 2009-11-18 |
TWI523704B (zh) | 2016-03-01 |
CN104496224A (zh) | 2015-04-08 |
TW200902173A (en) | 2009-01-16 |
US8439202B2 (en) | 2013-05-14 |
EP2103575A1 (en) | 2009-09-23 |
EP2103575B1 (en) | 2012-01-11 |
KR20090106470A (ko) | 2009-10-09 |
ATE540905T1 (de) | 2012-01-15 |
JPWO2008069118A1 (ja) | 2010-03-18 |
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